long int MetaDataTable::nextObject()
{
long int result = 0;
if (!isEmpty())
{
current_objectID++;
if (current_objectID < objects.size())
{
result = current_objectID;
}
else
{
result = NO_MORE_OBJECTS;
current_objectID = lastObject();
}
}
else
{
result = NO_OBJECTS_STORED;
current_objectID = -1;
}
return result;
}
LinkedDouble *LinkedDouble::getLast(void)
{
LinkedDouble *node;
enterLock();
node = lastObject();
leaveLock();
return node;
}
long int MetaDataTable::removeObject(long int objectID)
{
long int i = (objectID == -1) ? current_objectID : objectID;
if (objects[i])
{
objects[i]->clear();
delete objects[i];
}
objects.erase(objects.begin() + i);
return lastObject();
}
void LinkedDouble::insert(LinkedDouble& obj, InsertMode position)
{
LinkedDouble *node;
enterLock();
obj.detach();
switch ( position )
{
case modeAtFirst :
node = firstObject();
obj.nextObject = node;
node->prevObject = &obj;
break;
case modeBefore :
obj.nextObject = this;
obj.prevObject = this->prevObject;
this->prevObject = &obj;
if (obj.prevObject)
obj.prevObject->nextObject = &obj;
break;
case modeAfter :
obj.nextObject = this->nextObject;
obj.prevObject = this;
this->nextObject = &obj;
if (obj.nextObject)
obj.nextObject->prevObject = &obj;
break;
case modeAtLast :
default :
node = lastObject();
obj.nextObject = node->nextObject;
obj.prevObject = node;
node->nextObject = &obj;
if(obj.nextObject)
obj.nextObject->prevObject = &obj;
break;
}
leaveLock();
}
